Create a Hybrid Case - Intergraph Smart Instrumentation - Help

For a control valve for which you defined multiple cases, you can create a hybrid case from the minimum, normal, and maximum flow coefficient values (Cv/Kv) that you calculated for the various cases. Use this procedure to create such a hybrid case.

1. In the Process Data module or in the Calculation module, create multiple cases for the control valve for which you want to create a hybrid case. For details, see Create Process Data Cases.

2. Do one of the following to calculate every one of the cases:

   • In a Control Valve Calculation window for the given tag, calculate every one of the cases individually.

   • Perform a batch calculation procedure to select and calculate all the cases of the given control valve tag.

3. In the main window of the Calculation module, select Edit > Hybrid Case.

4. On the Select Tag dialog, select Find, and then select the tag for which you want to create a hybrid case.

5. On the Hybrid Case dialog, do the following to set values for the hybrid case:

   1. In the Case selection data window, select the value that you want to copy for the hybrid flow coefficient at minimum, and then select Add Minimum.

   2. In the Case selection data window, select the value that you want to copy for the hybrid normal flow coefficient, and then select Add Normal.

   3. In the Case selection data window, select the value that you want to copy for the hybrid flow coefficient at maximum and then select Add Maximum.

• Flow coefficients are displayed dynamically as Cv or Kv, depending on the method of calculation that you set for a given control valve in the Control Valve Calculation dialog.

• The software offers you the flexibility to select any value of a case for any level of the hybrid case — minimum, normal, or maximum.